Vytautas Siozinys © 2011 Kaunas University of Technology September 2011 | 1

Traveling wave based differential transmission line protection

dr. Vytautas Siozinys

Vytautas Siozinys © 2011 Kaunas University of Technology September 2011 | 2

Technical description

Substation BSubstation A

Transmission line

TBTA T0IED A IED B

Ethernet Ethernet

GPSGPS

.cTTL

x fault 2AB

Vytautas Siozinys © 2011 Kaunas University of Technology September 2011 | 3

Increase Transmission network: reliability, flexibility, stability, availability, equipment lifetime.

Technical description

Conventional IDEA

Increase line length

increase measurement

error

Increase line length

decrease

measurement error

Error 10-30% Error <1%

The GNSS is equivalent part of the system

Vytautas Siozinys © 2011 Kaunas University of Technology September 2011 | 4

Electrical energetic, transmission network operators.

Business case

Interest rate 0,12

Feasibility 100.000

Marketing 500.000

Total 600.000

Equipment

Market

price

30.000

-1.500.000

-1.000.000

-500.000

0

500.000

1.000.000

1.500.000

2.000.000

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Vytautas Siozinys © 2011 Kaunas University of Technology September 2011 | 5

Status of the idea: experiments in laboratory

Status of the innovator:Associated professor

Department of electric power systems Kaunas University of Technology

Head of system planning and research division, Litgrid AB

Current status

Characteristic

•Efficiency;•Fast response;•Flexibility;•Reliability;

Cooperation experience with MITA

Projects in 2011

•7FP Energy Research Information day in Brussels;•7FP ICT Research Information day in Brussels;•Galileo meeting in Munich;•7FP project “Rare earth permanent magnet lifting technology” meeting in Shanghai;

Opportunities

•Public reliation;•SME startup meeting in Italy;•Invitation participate in conference in Germany;